The possible risks of radio-frequent electromagnetic fields for the human body is a growing concern for society. The authors of this study have earlier shown that weak pulsed microwaves give rise to a significant leakage of albumin through the blood-brain barrier (BBB). Now they have investigated whether a pathological leakage over the BBB might be combined with damage to the neurons. Three groups of 8 rats each were exposed for 2 hours to GSM mobile phone electromagnetic fields of different strengths. The authors found, & present here for the first time, highly significant evidence for neuronal damage in both the cortex, the hippocampus & the basal ganglia in the brains of exposed rats. Illustrations.